Driving mechanism.



W. EVENSEN.

DHiVING MECHANISNI.

APPLICATION FILED JUNE 12, 19H.

1,257,830. Patented Feb. 26,1918.

2 SHEETS-SHEET 2.

lli?

WILLIAM nvENsnN,

coureur,

OF CHICAGO, ILLINOIS, ASSIGNOR TO THE OF CHICAGO, ILLINOIS, ACORPORATION OF ILLINOIS.

GOSS PRINTING PRESS DRIVING MECHANISM.

Application filed .Tune 12, 1917.

To all 'wim/1L it may concern.'

Be it known that I,- IVILLIAM EVENSEN, a citizen of the United States,and a resident of' Chicago, in the county of Cook and State of Illinois,have invented certain new and useful Improvements in Driving Mechanisms,of which the following is a specification, reference being hadl to theaccompanying drawings.

Iy invention relates to driving mechanisms and particularly to a form ofdriving mechanism adapted for use with printing presses. It is one ofthe principal objects of my invention to provideia form and arrangementof driving parts comprising a clutch through which the power may beapplied at low speed, such clutch being'of a type adapted to take holdvvimmediately without slippage when power is to be transmittedtherethrough, thereby preventing any tendency of the press being drivento first choke and then start suddenly, as would be the ease if therewere any appreciable lost motion in the connections between the pressand the source of power. It is another object of my invention to providea mechanism of this type which shall be substantially noiseless at allstages of the operation of the press.' It is another object of myinvention to improve driving mechanisms of this type in sundry detailshereinafter pointed out. The preferred means by which I haveaccomplished my several objects are illustrated in the drawings and arehereinafter specifically described. That which I believe to be new anddesire to cover by this application is set forth in the claims.

In the drawings:

Figure 1 is a top or plan view of a driving mechanism embodying thepreferred form of my invention;

Fig. 2 is an enlarged detail, being an enlarged sectional view takensubstantially on line 2 2 of Fig. 1; and

Fig. 3 is a horizontal sectional View through the parts shown in Fig. 2,being taken substantially on line 33 of said figure.

Referring to the several figures of the drawings in which correspondingpartsare indicated by the same reference characters,-

10 indicates a drive sha-ft revolubly mounted in bearings 11 of anysuitable type adaptd Specification of Letters Patent.

Patented Feb. 26, 191s. Serial N o. 174,249.

to be driven by a motor 12 suitably connected therewith. The shaft 10has revolubly mounted thereon a large gear 13 from which power is to betransmitted through any-suitable train of mechanism to a printing pressor any other mechanism to be driven. The gear 13 is adapted to beconnected with the shaft 10 so as to rotate therewith by means of aclutch mechanism 14 of any suitable type which is adapted to be throwninto and out of operation by means of a shifting lever 15 havingoperative engagement with a groove 16 in a slidably mounted clutchmember 17. lVhen the lever 15 is in the position shown in Fig. 1 theclutch 14 is maintained in operation for causing the gear 13 to rotatewith the shaft 10. hen the lever 15 is given a stroke in the directionaway from the gear 13, the toggle levers 18 of the clutch arestraightened more or less relative to each other, serving to throw theclutch out of operation.

The shaft l0 is also operatively connectedwith the gear 13 through themedium of a train of mechanism by which the gear 13 can be driven at acomparatively very much slower rate of speed. This mechanism com` prisesa pinion 19 ixedly mounted upon the shaft 10 meshing with a gear 2Owhich is revolubly mounted upon a shaft 21 journaled in bearings 22alongside of the shaft 10. The shaft 21 is adapted to be connected witha rotary member 23 by means o1.' a clutch 24 similar to the clutch 14.The clutch 24 is adapted to be thrown into operation by means of a lever25 engaging a groove 26 in a clutch member 27, a movement of the member27 longitudinally of the shaft 21 serving through the toggle arms 28 tothrow the clutch 24 into and out of operation as Iwill be readilyunderstood. The shaft 21 is connected with the gear 13 b means of apinion 29 meshing with suc gear.

The train of mechanism for connecting the shaft 10 with the gear 13through the medium of the shaft 21 and its cooperating parts comprisesclutch connections between the gear 20 and the rotary member 23.

These connections comprise a drum or collar 30 keyed or otherwise firmlysecured upon the hub 31 of the gear 20, the drum 30 being locatedadjacent to the rotary member 23 as is best shown in Fig. 3. A pluralityof friction shoes 32 of any suitable type are pivotally mounted upon theinner ends of links 33 which in turn are pivotally mounted upon therotary member Z3 by means of pins or bolts 34. Springs 35 are connectedto the links 33 respectively and to the rotary member 23, such springs35 having a tendency to draw the links 33 toward their radial positions,the shoes 32 into contact with the periphery of the drum 30. Theperiphery of the drum -30 and the engaging faces of the shoes 32 areadapted to be of any appropriate ma terial and form so as to produce aproper frictional engagen'ient between the contact? rotated in clockwisedirection in Fig. the rotary member will be caused to rotate in the samedirection therewith. In the construction shown, the shoes 32 areprovided with friction facings 32 of leather or other suitable material,and the drum 30 is corrugated on its face to facilitatethe grippingaction. lVhile the strength of the springs is such as to hold the shoes32 normally in position to be immediat-ely operative for causing therotationof the rotary member Q3 upon the rotation 0f the drum 30 Vinclockwise direction in Fig. 2, such springs are not ofl such a strengthas to cause a rotation of the drum 30 'in clock- 'wise direction whenpower is applied to the rotary member 23 for rotating it in clockwisedirection in said figure independently of the drum 30.

lVith the motor 12l causing a rotation of the shaft 10 in the directionindicated by the arrow thereon in Fig. 1, the pinion 19 Will be drivenin the same direction, causing a rotation of the gear 2O and the hub 31in the opposite direction as indicated by the arrow on said hub in saidfigure. `With the clutch 14 out of operation by reason of a propermanipulation of the lever 15, and with the clutch Q4 yin operation,power will then be applied from the hub 31 and drum 30 through the shoesand links 33 to the rotary member and through the clutch Q-l to theshaft21 to drive such shaft in theadirectionindicated by the arrow thereon inFig. l, such motion heilig transmitted through the pinion 39 to thc gear13 for driving such gear 13 uthe di rection indicated by the arrow uponthe clutch mechanism 14. in said figure. Vhen it is desired to speed upthe driving of the printing press or other machine operatively connectedwith the gear 13 as above described, this is accomplished by throwingthe clutch 14 into operation, serving to connect the gear 13 directlywith the shaft 1() soas to cause such gear 13 to rotate at the samespeed as that of the motor 12 instead of at the comparatively milchslower speed when the power is applied through the stepserving to bringvnig surfaces so that when the drum 30 is' down gearing 15)20 and Z9-13.When the gear 13 is thus driven at high speed, the pinion Q9 and theshaft 21 will be driven ata comparatively higher speed, as will bereadily understood, servin to rotate the rotary member Q3 at a veryiighspeed in the direction indicated by the arrow upon the hub 31 in Fig.1,--that is to say, in the direction indicated by the arrow adjacent totherotary member 23 inFig. 2. Immediately upon the application of owerthrough the clutch 14, the rotary mem er Q3 will begin to rotate inclockwise direction in Fig.

2 independently of the drum 30, the springs 35 being adapted to yield asabove described to permit the loosening of the slices upon the drum 30.As the clutch Vlll tightens, serving to increase the speed of rotationof the rotary member Q3, the shoes 32 are caused to move outward bycentrifugal forcey i against the action of y the springs 35 out ofcontact with the drum 30. In case the clutch 2l is then thrown out ofoperation so as to disconnect the rotary member Q3 from the shaft 21,'the high speed driving of the rotary member 23 will cease, and thesprings 35 Awill again draw the shoes 32 into contact with the drum 30whereupon the rotary member will again begin its slow speed rotationwith the gear 20.

lVlien the press is being driven at high speed, as above described, andit is desired for any 'reason to change to the low speed driving, thepower for continuing the driv ing of the press at the low speed isapplied immediately without any lost motion through the medium of thefriction shoes 3Q just as soon as the press is slowed down to its normalslow speed rotation, the shoes 32 being brought into loose contact withthe drum 30 by reason of the slowing down of the rotary member 23 sometime 1n advance of the beginning of the application of power through theslices. The press is thus assured against any possible falling belowthenormal slow speed driving and against any possible choking or suddenstarting upon the transfer from the high speed drive to the low speeddrive. Moreover, it is plain that there can be no abnormal slowing downor choking of the press upon a change from the low speed driving to thehigh speed driving since the high speed driving inecl'ianism thrown intooperation without a prior disconnection of the low speed drivingmechanism. 'With the press being run smoothly and evenly in this manner,a change from the high speed to the low speed driving or from the lowspeed to the high speed driv ing can be accomplished without anysubstantial danger that the web shall be snapped by reason of thechange. lnasmuch as this feature is very important in printing presswork, it will be seen that my invention is peculiarly adapted for usewith 1 ery of said drum tes-asso printing presses, but it will beunderstood that I do not wish to limit myself to that particular useexclusively.

. So far as I am aware, I am the first in the art to provide a drivingmechanism comprising a rotary drum, and a rotary member journaled uponthe axis of the drum and provided with one or more friction shoesmova'bly mounted thereon and adapted to o eratively engage the outerperiphery of tlie drum, whether or not such shoes are providedwithfriction, faeings of leather or other yielding material, and VWhether ornot such drum is corrugated as in the construction shown in thedrawings, and my claims are to be construed accordingly.

What Iclaimas my invention and desire to secure by Letters ,)atent, is

l. In a driving mechanism, the combination of a drum, means for rotatingsaid drum in one direction, a rotary member journaled upon the axisabout which Saiddrum rotates,

a friction shoe adapted to be brought intoengagement with the peripheryof said drum and adapted when in operative engagementl todrive therotary member in the same direction, and other means for rotatingy saidrotary member in the same direction at a higher speed, serving to carrysaid friction shoe out of operative engagement with the drum. l f

2. In a driving mechanism, the combination of a drum, means for rotatingsaid drum in one direction, a rotary member jonrnaled upon the axisabout which said drum rotates, a friction shoe adapted to be broughtinto engagement with the periphery of said drum and adapted when inoperative engagement to drive the rotary member in the same direction,and other means for rotating said rotary member in the same direction ata higher speed, serving to cause said friction shoe to move outward bycentrifugal force out of operative engagement with the drum.

3. In a driving mechanism, the combination of a drum, means for rotatingsaid drum in one direction, a rotary member journaled upon the axisabout which said drum rotates, a frictionshoe adapted to be brought intoengagement with the periphand adapted when in operative engagement todrive the rotary member in the same direction, and other means forrotating said rotary member in the same direction at a higher speed,serving to move the friction shoe outwardly from engagement with thedrum.

lnto operative engagement with the periphagainst the action of said eryof the drum and adapted when in operative engagement to drive the rotarymember in the same direction, and other means for rotating said rotarymember -with the friction shoe carried thereby in the same direction ata higher speed serving to carry said friction shoe by centrifugal forceoutward out of operative engagement with the drum.

5. In a driving mechanism, the combination of a drum, means for rotatingsaid drum in one1 direction, a, rotary member journaled upon the axisabout which said drum rotates, a friction shoev movabl y mounted on saidrotary member adapted to be brought into operative engagement with thei-)erilihery of the drum and adapted when in operative engagement todrive the rotary member in the Asame direction, yielding means tendingto hold said friction shoe 1n operative engagement with said drum, andother means for rotating said rotary member with the friction shoecarried thereby in the same direction at a higher speed serving to carrysaid friction shoe outward by centrifugal force yielding means out ofoperative engagement with the drum.

In a driving mechanism, the combination of a drum, means for rotatingsaid drum in one direction, a rotary member` journaled upon the axisabout which said drum rotates, a plurality of links pivotally mounted onsaid rotary member and'extending toward the periphery of said drum, aplurality of friction shoes connected with the inner end portions ofsaid links respectively and adapted to have operative engagement withsaid drum when said links are swung Substantially into radial position,yielding means tending to swing said links into radial position forcausing the friction shoes to rotate said rotary member vwith said drum,andother means for rotating said speed serving to out of operativeengagement with the drum.

7. In a driving mechanism, the combination of a drum, means for rotatingsaid drum in one direction, a rotary member journaled upon the axisabout which said drum rotates, a friction shoe adapted to be broughtinto engagement with the periphery of said drum and adapted when inoperative engagement to drivethe rotary member in the same direction,and other means for rotating said rotary member in the same direction ata higher speed, serving to cause said friction shoe to lag behindslightly rel-4 ative to its operative position upon the rotary memberand eventually to move outward by centrifugal force out of operativeengagement with the drum.

8. In a driving mechanism, the combination of a rotary drum, a rotaryrmember journaled upon the axis about which said drum a friction Shoemovably the corrugated face of said drum,

is adapted to revolve, a friction shoe movably mounted on said rotarymember adapted to be brought into operative engagement with the outerface of said drum and adapted when in operative engagement to lock saiddrum and said rotary member against rotation in one direction relativeto each other, and yielding means tending to hold said friction shoe inoperative engagement with said drum.

9. In a driving mechanism, the combina,- tion of a drum provided withlongitudinallyextending corrugations on its outer face, a rotary memberjournaled upon the axis about which said drum is revolubly mounted,mounted on said rotary member and provided with a friction facing ofyielding material adapted to be brought into operative engagement withand yield-l .vided with a friction maman ing means tending to hold saidfriction shoe in operative engagement with said drum whereby either thedrum or the rotary member is adapted to drive the other in onedirection.

10. In a driving mechanism, the combination of a drum provided withlongitudinallyextending corrugations on its outer face, a rotary memberjournaled upon the Vaxis about which said drum is revolubl mounted, aplurality of friction shoes movalily mounted on said rotary member andeach profacing of yielding material adapted to be brought into operativeengagement with the corrugated face of said drum, and means for holdingsaid shoes yieldingly in operative Contact with said drum for rotatingthe drum in one direction.

WILLIAM EVENSEN.

